lantiq: fix mtdparsers refcount leak and memory leak

Release previously allocated memory and OF node before return.

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: openwrt/openwrt#22276
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 4778e35)
Link: openwrt/openwrt#22348
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

Author: DragonBluep

target/linux/lantiq/patches-6.6/0101-find_active_root.patch

@@ -5,8 +5,8 @@ Subject: [PATCH] find active root
 
 Signed-off-by: Mathias Kresin <openwrt@kresin.me>
 ---
- drivers/mtd/parsers/ofpart_core.c | 49 ++++++++++++++++++++++++++++++-
- 1 file changed, 48 insertions(+), 1 deletion(-)
+ drivers/mtd/parsers/ofpart_core.c | 53 +++++++++++++++++++++++++++++++
+ 1 file changed, 53 insertions(+)
 
 --- a/drivers/mtd/parsers/ofpart_core.c
 +++ b/drivers/mtd/parsers/ofpart_core.c
@@ -58,18 +58,22 @@ Signed-off-by: Mathias Kresin <openwrt@kresin.me>
 
  	/* Pull of_node from the master device node */
  	mtd_node = mtd_get_of_node(master);
-@@ -95,7 +129,9 @@ static int parse_fixed_partitions(struct
- 		return 0;
+@@ -98,6 +132,14 @@ static int parse_fixed_partitions(struct
+ 	if (!parts)
+ 		return -ENOMEM;
 
- 	parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
--	if (!parts)
 +	part_nodes = kcalloc(nr_parts, sizeof(*part_nodes), GFP_KERNEL);
++	if (!part_nodes) {
++		if (dedicated)
++			of_node_put(ofpart_node);
++		kfree(parts);
++		return -ENOMEM;
++	}
 +
-+	if (!parts || !part_nodes)
- 		return -ENOMEM;
- 
  	i = 0;
-@@ -166,6 +202,11 @@ static int parse_fixed_partitions(struct
+ 	for_each_child_of_node(ofpart_node,  pp) {
+ 		const __be32 *reg;
+@@ -166,6 +208,11 @@ static int parse_fixed_partitions(struct
  		if (of_property_read_bool(pp, "slc-mode"))
  			parts[i].add_flags |= MTD_SLC_ON_MLC_EMULATION;
 
@@ -81,7 +85,7 @@ Signed-off-by: Mathias Kresin <openwrt@kresin.me>
  		i++;
  	}
 
-@@ -175,6 +216,11 @@ static int parse_fixed_partitions(struct
+@@ -175,6 +222,11 @@ static int parse_fixed_partitions(struct
  	if (quirks && quirks->post_parse)
  		quirks->post_parse(master, parts, nr_parts);
 
@@ -93,7 +97,7 @@ Signed-off-by: Mathias Kresin <openwrt@kresin.me>
  	*pparts = parts;
  	return nr_parts;
 
-@@ -185,6 +231,7 @@ ofpart_fail:
+@@ -185,6 +237,7 @@ ofpart_fail:
  ofpart_none:
  	of_node_put(pp);
  	kfree(parts);